21487+3231 GRV 508

21^h 48^m 42.60^s +32° 31' 23.9" P.A. 8.00 sep 48.6 mag 13.23,13.86

Coord 2000	21487+3231	Discov num	GRV 508	Comp		Coord arcsec 2000	21 48 42.60 +32 31 23.9
Date first	1999	Date last	2014	Obs	6
Pa first	8	Pa last	7.8	P.A. Now (θ)	7.8°
Sep first	48.7	Sep last	48.619	Sep. Now (ρ)	48.619"
Mag pri	13.23	Mag sec	13.86	delta mag (ΔM)	0.63	Spectral class
Pri motion ra	-012	Sec motion ra	-006
Pri motion dec	-018	Sec motion dec	-022
Notes

rPM=0.316

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Gaia DR2

1946415514254482560

WDS 21487+3231 GRV 508 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Grv2004	Eu -	Greaves, J.	2004MNRAS.355..585G
Grv2004		MNRAS 355, 585, 2004
Grv2005a	Es -	Greaves, J.	...................
Grv2005a	+C	Webb Soc., Double Star Circ. 13, 2005 (GRV 973 - 1147)
Grv2005a		(Note: RA for all WDS designations inadvertently truncated to integer minute)
Grv2005b	Pa -	Greaves, J.	...................
Grv2005b		private communication
Grv2005c	C -	Greaves, J.	2005JDSO....1...41G
Grv2005c		JDSO 1, 41, 2005
Grv2006	-	Greaves, J.	...................
Grv2006		private communication, 2006
Grv2006		(measures done using LSPM-north, see Vizier On-line Data Catalog I/298;
Grv2006		Lepine & Shara 2005)
Grv2006b	Es -	Greaves, J.	...................
Grv2006b		private Communication, 2006
Grv2006b		(Reduction of SDSS data. Calculated position is to J2000, but actual observation
Grv2006b		epoch is unknown and proper motion may or may not have been applied.)
Grv2006c	Ey -	Greaves, J.	...................
Grv2006c		private Communication, 2006
Grv2006c		(Reduction of SPM3.3 data. Calculated position is to 1991.25, but actual
Grv2006c		observation epoch is unknown and proper motion may or may not have been applied.)
Grv2008	Es -	Greaves, J.	...................
Grv2008		Webb Soc., Double Star Circ. 16, 2008
Grv2011	C -	Greaves, J.	...................
Grv2011		Webb Soc., Double Star Circ. 19, 2011
Grv2011		These carry a discovery designation of SPM and come from the SPM4 Catalog	2011AJ....142...15G
Grv2019a	Hg u	Greaves, J.	2019JDSO...15...59G
Grv2019a		JDSO 15, 59, 2019
Grv2019b	Hg u	Greaves, J.	2019JDSO...15...77G
Grv2019b		JDSO 15, 59, 2019
Grv2019c	Hg u	Greaves, J.	...................
Grv2019c		private communication, 2019 (17 April 2019 email)
Grv2019d	Hg -	Greaves, J.	.
Grv2019d		private communication, 2019 (4 Nov 2019 email)
Grv2020a	not -	Greaves, J.	.
Grv2020a		private communication, 2020 (14 Mar 2020 email)
Grv2020b	Hg j	Greaves, J.	.
Grv2020b		Webb Soc., Double Star Circ. 28, 23, 2020
Grv2020c	Hg j	Greaves, J.	.
Grv2020c		Webb Soc., Double Star Circ. 28, 35, 2020
Grv2020d	Hg j	Greaves, J.	.
Grv2020d		Webb Soc., Double Star Circ. 28, 39, 2020
Grv2020e	Hg u	Greaves, J.	2020JDSO...16..317G
Grv2020e		JDSO 16, 317, 2020
Grv2020f	Hg	Greaves, J.	2020JDSO...16..362G
Grv2020f		JDSO 16, 362, 2020
Grv2020g	Hg -	Greaves, J.	.
Grv2020g		private communication, 2020 (29 Nov 2020 email)
Grv2020h	Hg -	Greaves, J.	.
Grv2020h		private communication, 2020 (10 Dec 2020 email)
Grv2020i	Hg -	Greaves, J.	.
Grv2020i		private communication, 2020 (12 Dec 2020 email)
Grv2020j	Hg -	Greaves, J.	.
Grv2020j		private communication, 2020 (21 Dec 2020 email)
Grv2021a	not -	Greaves, J.	.
Grv2021a		private communication, 2021 (18 Feb 2021 email)
Grv2021b	not -	Greaves, J.	.
Grv2021b		private communication, 2021 (23 Feb 2021 email)
Grv2021c	Hg+ -	Greaves, J., Rica Romero, F.M. & Otero, S.	2021JDSO...17..137G
Grv2021c	+orb	JDSO 17, 137, 2021
Grv2021d	Hg -	Greaves, J.	.
Grv2021d		private communication, 2021 (23 Aug 2021 email)
Grv2021e	Hg -	Greaves, J.	.
Grv2021e		private communication, 2021 (24 Aug 2021 email)
Grv2022	Hg j	Greaves, J. .
Grv2022		Webb Soc., Double Star Circ. 30, 27, 2022
Grv2023a	Hg -	Greaves, J.	.
Grv2023a		private communication, 2023 (15 Feb 2023 email)

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21487+3231	GRV 508		2000	2	8	48.7	12.90	13.30		D	214842.60+323123.9
21487+3231	GRV 508		2002	3	8	48.7	12.90	13.30		D	214842.60+323123.9
21487+3231	GRV 508		2010	3	8	48.7	13.23	13.86			214842.60+323123.9
21487+3231	GRV 508		2014	6	8	48.6	13.23	13.86			214842.60+323123.9

If you need more information about this double, apply for a data request form to the WDS.

WDS 21487+3231 GRV 508 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21487+3231 GRV 508 : MEASURES

No records found.

WDS 21487+3231 : VIRTUAL EYEPIECE

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Pass over with the mouse cursor to display the catalog designation.

WDS 21487+3231 : ALADIN DSS IMAGE @ 21^h 48^m 42.60^s +32° 31' 23.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21487+3231 GRV 508 : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		21487+3231	GRV 508		8	48.6
Show		21487+3233	GRV 510		98	26.5	3
Show		21487+3251	ES 2386		232	4.8	20
Show		21469+3229	GYL 65		30	66.0	23
Show		21492+3254	ES 2265		25	3.4	24
Show		21509+3240	FYM 143	CD	90	46.9	29
Show		21509+3240	FYM 143	CE	112	45.1	29
Show		21509+3240	FYM 143	CF	160	36.3	29
Show		21509+3240	ES 382	AB	310	9.9	29
Show		21509+3240	ES 382	AC	322	58.1	29
Show		21509+3240	FYM 143	AF	298	26.0	29
Show		21493+3303	J 3146		330	2.6	35
Show		21479+3306	OSO 157	AB	352	5.3	37
Show		21479+3306	OSO 157	AC	72	11.6	37
Show		21479+3306	OSO 157	AD	29	13.9	37
Show		21479+3306	OSO 157	AE	322	21.6	37
Show		21479+3306	OSO 157	AF	123	16.2	37
Show		21501+3151	BU 692	BC	292	40.8	45
Show		21501+3151	BU 692	AB	10	2.9	45
Show		21501+3151	FOX 264	AD	150	40.2	45
Show		21501+3151	FOX 264	AE	178	54.5	45
Show		21501+3151	BU 692	AC	292	40.9	45
Show		21522+3252	ES 2321		279	2.0	45
Show		21496+3319	HDS3106		140	0.1	49
Show		21497+3320	ES 210		111	6.5	51
Show		21456+3307	COU1187		267	5.1	53
Show		21457+3152	J 2356		135	6.3	56
Show		21476+3326	TDT3156		160	0.4	57
Show		21530+3210	KPP4254		337	2.2	59
Show		21468+3328	ES 2264		291	8.0	61
Show		21441+3205	J 2354	AB	199	4.9	63
Show		21441+3205	DAM 235	BC	206	6.5	63
Show		21532+3205	ES 2322	DE	276	5.0	63
Show		21441+3203	J 2355		346	3.5	63
Show		21532+3205	ES 2322	AB	52	35.7	63
Show		21532+3205	ES 2322	AD	352	62.1	63
Show		21519+3319	A 2692		239	3.1	63
Show		21532+3205	ES 2322	BC	147	5.1	64
Show		21449+3145	ES 381		110	4.6	68
Show		21449+3322	ES 2385	AB	271	5.2	69
Show		21449+3322	ES 2385	AC	358	26.7	69
Show		21529+3327	J 3151		348	6.4	74
Show		21444+3140	HJ 1686		229	13.7	75
Show		21544+3206	COU1042		108	1.4	77
Show		21479+3117	HJ 1688		351	16.4	77
Show		21487+3115	HJ 1695		115	13.3	77
Show		21544+3204	TDT3227		175	1.3	78
Show		21547+3220	LAF 67	AB	31	2.9	78
Show		21547+3220	LAF 67	AC	6	7.8	78
Show		21547+3220	LAF 67	AD	301	9.5	78
Show		21547+3220	LAF 67	AE	138	10.5	78

WDS 21487+3231 : COMPONENTS

	A
B	pa=6.6° sep=48.49"

21487+3231 A

Componente originario normalizzato	AB		Coord arcsec 2000	214842.60+323123.9		Mag	13.23		PmRA	-12.00
PmDE	-18.0

21487+3231 B

Componente originario normalizzato	AB		Coord arcsec 2000	214843.04+323212.1		Mag	13.86		PmRA	-6.00
PmDE	-22.0		Calc delta mag	0.63		Calc coord	yes